The disctinctive feature of the Professional edition is that four drive protection modes are supported:
NORMAL PROTECTION MODE - Data is recovered at each computer restart. This mode is also supported by the Disk Write Copy Personal edition for home use.
FAST PROTECTION MODE - This mode features faster initialization at computer restart, which allows faster recovering after faults.
INCREMENTAL PROTECTION MODE - When this mode is active, the user can choose himself when to recover the data, i.e. arbitrary number of restarts is possible and data between the restarts will be accumulated and stored using the Disk Write Copy technology.
INCREMENTAL-FAST MODE - This mode features faster initialization at computer restart, which allows faster recovering after faults